Analysis and Synthesis of Logic Functions using 3:8 Decoder (IC 74138)

INSTRUCTION

  1. Apply high volatge to VCC and G1, and low level voltage to ground(GND)
  2. Apply low voltage to all the select inputs (CBA). Check Y0 is at low state and all other are at high state.
  3. Apply low voltage to CB and high volatge to A. Check Y1 is at low state and all other are at high state.
  4. Click "Add to table" after every inputs. This will create the truth table in the below section.
  5. Note: Red button symbolize as Low (L), Green button symbolize as High(H).

TRUTH TABLE



3:8 Decoder
Decimal Select Inputs Outputs
C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7

CIRCUIT DIAGRAM

circuit image
circuit image circuit image circuit image circuit image circuit image circuit image circuit image circuit image